Journal
GEOPHYSICAL RESEARCH LETTERS
Volume 31, Issue 17, Pages -Publisher
AMER GEOPHYSICAL UNION
DOI: 10.1029/2004GL020561
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A wide-angle stack using all onshore-offshore, and onshore seismic data from the SIGHT'96 experiment provides a direct three-dimensional (3-D) image of the Moho below the continental collision zone through the South Island of New Zealand. A bright reflector sequence (up to 4 s thick), the base of which coincides with the PmP modeled Moho, extends throughout most of the lower crust and bends downward asymmetrically beneath the Southern Alps. The crustal root reaches a maximum depth at similar to15 s (45 km), beneath the regional (-80 mGal) Bouguer gravity low and is flanked east and west by shallower Moho where the average crustal thickness is similar to20 km. The 3-D structure of the crustal root in the central South island is moderately well resolved by the SIGHT'96 experiment.
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